content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package io.reactivex.flowable.internal.operators;
  
  import static org.junit.Assert.*;
  import static org.mockito.Mockito.*;
  
  import org.junit.*;
  import org.mockito.Mockito;
  import org.reactivestreams.Subscriber;
  
  import io.reactivex.common.functions.Action;
  import io.reactivex.common.internal.utils.ExceptionHelper;
  import io.reactivex.flowable.*;
  import io.reactivex.flowable.subscribers.TestSubscriber;
  
  public class FlowableDoAfterTerminateTest {
  
      private Action aAction0;
      private Subscriber<String> observer;
  
      @Before
      public void before() {
          aAction0 = Mockito.mock(Action.class);
          observer = TestHelper.mockSubscriber();
      }
  
      private void checkActionCalled(Flowable<String> input) {
          input.doAfterTerminate(aAction0).subscribe(observer);
          try {
              verify(aAction0, times(1)).run();
          } catch (Throwable ex) {
              throw ExceptionHelper.wrapOrThrow(ex);
          }
      }
  
      @Test
      public void testDoAfterTerminateCalledOnComplete() {
          checkActionCalled(Flowable.fromArray("1", "2", "3"));
      }
  
      @Test
      public void testDoAfterTerminateCalledOnError() {
          checkActionCalled(Flowable.<String> error(new RuntimeException("expected")));
      }
  
      @Test
      public void nullActionShouldBeCheckedInConstructor() {
          try {
              Flowable.empty().doAfterTerminate(null);
              fail("Should have thrown NullPointerException");
          } catch (NullPointerException expected) {
              assertEquals("onAfterTerminate is null", expected.getMessage());
          }
      }
  
      @Test
      public void nullFinallyActionShouldBeCheckedASAP() {
          try {
              Flowable
                      .just("value")
                      .doAfterTerminate(null);
  
              fail();
          } catch (NullPointerException expected) {
  
          }
      }
  
      @Test
      public void ifFinallyActionThrowsExceptionShouldNotBeSwallowedAndActionShouldBeCalledOnce() throws Exception {
          Action finallyAction = Mockito.mock(Action.class);
          doThrow(new IllegalStateException()).when(finallyAction).run();
  
          TestSubscriber<String> testSubscriber = new TestSubscriber<String>();
  
          Flowable
                  .just("value")
                  .doAfterTerminate(finallyAction)
                  .subscribe(testSubscriber);
  
          testSubscriber.assertValue("value");
  
          verify(finallyAction).run();
          // Actual result:
          // Not only IllegalStateException was swallowed
          // But finallyAction was called twice!
      }
  }
  